. >>> starting last year, state law requires any home with an attached garage to have co detectors here in california and multiunit buildings have until january 1st to am ply. i just learned some of the victims have been released from the hospital. fire officials say old heaters starting up with the cold weather are a common cause for carbon monoxide poisoning. crews are searching for the source. they say if you have symptoms or a detector goes off in your home, call 9111 and get out of the building immediately. live in san francisco, monty francis, nbc bay area news. >> lucky family and good reminder. >>> it has been a deadly weekend on roadways across the state. the california highway patrol says 25 people died on the roads during what is one of the busiest travel times of the year. one of those deadly crashes happened last night on highway 50 near placerville where three members of a bay area family died. kimberly tere has new information on who these victims were. >> we are learning more about the victims. both vehicles were carrying families with very young children. chp says the p